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1 # wcsrtombs.m4 serial 1 |
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2 dnl Copyright (C) 2008 Free Software Foundation, Inc. |
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3 dnl This file is free software; the Free Software Foundation |
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4 dnl gives unlimited permission to copy and/or distribute it, |
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5 dnl with or without modifications, as long as this notice is preserved. |
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6 |
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7 AC_DEFUN([gl_FUNC_WCSRTOMBS], |
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8 [ |
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9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
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10 |
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11 AC_REQUIRE([AC_TYPE_MBSTATE_T]) |
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12 AC_CHECK_FUNCS_ONCE([wcsrtombs]) |
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13 if test $ac_cv_func_wcsrtombs = no; then |
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14 HAVE_WCSRTOMBS=0 |
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15 else |
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16 gl_WCSRTOMBS_TERMINATION |
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17 gl_WCSRTOMBS_NULL |
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18 case "$gl_cv_func_wcsrtombs_termination" in |
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19 *yes) ;; |
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20 *) AC_DEFINE([WCSRTOMBS_TERMINATION_BUG], [1], |
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21 [Define if the wcsrtombs function may set the source pointer to NULL without NUL-terminating the destination.]) |
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22 REPLACE_WCSRTOMBS=1 ;; |
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23 esac |
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24 case "$gl_cv_func_wcsrtombs_null" in |
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25 *yes) ;; |
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26 *) AC_DEFINE([WCSRTOMBS_NULL_ARG_BUG], [1], |
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27 [Define if the wcsrtombs function has the NULL destination argument bug.]) |
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28 REPLACE_WCSRTOMBS=1 ;; |
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29 esac |
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30 fi |
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31 if test $HAVE_WCSRTOMBS = 0 || test $REPLACE_WCSRTOMBS = 1; then |
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32 gl_REPLACE_WCHAR_H |
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33 AC_LIBOBJ([wcsrtombs]) |
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34 gl_PREREQ_WCSRTOMBS |
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35 fi |
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36 ]) |
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37 |
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38 dnl Test whether the wcsrtombs implementation stores a non-NULL source pointer |
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39 dnl as long as it has not written the final NUL byte to the destination string. |
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40 dnl The OSF/1 5.1 implementation stores a NULL pointer already after storing |
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41 dnl the last non-NUL character, even if there is no more room for the |
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42 dnl terminating NUL character. |
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43 dnl Result is gl_cv_func_wcsrtombs_termination. |
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44 |
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45 AC_DEFUN([gl_WCSRTOMBS_TERMINATION], |
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46 [ |
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47 AC_REQUIRE([AC_PROG_CC]) |
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48 AC_REQUIRE([gt_LOCALE_FR]) |
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49 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
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50 AC_CACHE_CHECK([whether wcsrtombs updates the source pointer correctly], |
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51 [gl_cv_func_wcsrtombs_termination], |
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52 [ |
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53 dnl Initial guess, used when cross-compiling or when no suitable locale |
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54 dnl is present. |
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55 changequote(,)dnl |
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56 case "$host_os" in |
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57 # Guess no on OSF/1. |
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58 osf*) gl_cv_func_wcsrtombs_termination="guessing no" ;; |
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59 # Guess yes otherwise. |
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60 *) gl_cv_func_wcsrtombs_termination="guessing yes" ;; |
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61 esac |
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62 changequote([,])dnl |
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63 if test $LOCALE_FR != none; then |
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64 AC_TRY_RUN([ |
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65 #include <locale.h> |
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66 #include <stdlib.h> |
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67 #include <wchar.h> |
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68 int main () |
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69 { |
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70 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) |
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71 { |
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72 const char original[] = "B\374\337er"; |
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73 wchar_t input[10]; |
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74 |
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75 if (mbstowcs (input, original, 10) == 5) |
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76 { |
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77 const wchar_t *src = input; |
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78 char output[5]; |
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79 wcsrtombs (output, &src, 5, NULL); |
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80 if (src != input + 5) |
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81 return 1; |
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82 } |
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83 } |
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84 return 0; |
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85 }], |
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86 [gl_cv_func_wcsrtombs_termination=yes], |
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87 [gl_cv_func_wcsrtombs_termination=no], |
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88 []) |
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89 fi |
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90 ]) |
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91 ]) |
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92 |
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93 dnl Test whether the wcsrtombs implementation supports a NULL argument |
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94 dnl correctly. This is not the case on HP-UX 11.11 and OSF/1 5.1: These |
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95 dnl implementations updates the source pointer also if the destination argument |
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96 dnl is NULL. |
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97 dnl Result is gl_cv_func_wcsrtombs_null. |
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98 |
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99 AC_DEFUN([gl_WCSRTOMBS_NULL], |
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100 [ |
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101 AC_REQUIRE([AC_PROG_CC]) |
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102 AC_REQUIRE([gt_LOCALE_FR]) |
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103 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
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104 AC_CACHE_CHECK([whether wcsrtombs supports a NULL argument correctly], |
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105 [gl_cv_func_wcsrtombs_null], |
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106 [ |
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107 dnl Initial guess, used when cross-compiling or when no suitable locale |
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108 dnl is present. |
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109 changequote(,)dnl |
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110 case "$host_os" in |
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111 # Guess no on HP-UX and OSF/1. |
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112 hpux* | osf*) gl_cv_func_wcsrtombs_null="guessing no" ;; |
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113 # Guess yes otherwise. |
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114 *) gl_cv_func_wcsrtombs_null="guessing yes" ;; |
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115 esac |
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116 changequote([,])dnl |
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117 if test $LOCALE_FR != none; then |
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118 AC_TRY_RUN([ |
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119 #include <locale.h> |
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120 #include <stdlib.h> |
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121 #include <wchar.h> |
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122 int main () |
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123 { |
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124 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) |
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125 { |
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126 const char original[] = "B\374\337er"; |
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127 wchar_t input[10]; |
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128 |
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129 if (mbstowcs (input, original, 10) == 5) |
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130 { |
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131 const wchar_t *src = input; |
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132 wcsrtombs (NULL, &src, 10, NULL); |
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133 if (src != input) |
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134 return 1; |
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135 } |
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136 } |
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137 return 0; |
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138 }], |
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139 [gl_cv_func_wcsrtombs_null=yes], |
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140 [gl_cv_func_wcsrtombs_null=no], |
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141 []) |
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142 fi |
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143 ]) |
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144 ]) |
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145 |
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146 # Prerequisites of lib/wcsrtombs.c. |
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147 AC_DEFUN([gl_PREREQ_WCSRTOMBS], [ |
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148 : |
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149 ]) |
